What are frost heaves?

[raccoon]

Reading about taking a train in Canada, it said, IIRC, "In the summer, the train is late because of frost heaves."

[GirlinContempt]

1. The ground is raised because ice built up under it,

often under a sidewalk, and then expanded/contracted when it melted/refroze.

Or google:
http://www.google.ca/search?hl=en&q=define+frost+heave&btnG=Google+Search&meta=

[Burma Jones]

2. Wikipedia is your friend

http://en.wikipedia.org/wiki/Frost_heaving

[crim son]

3. In the summer? Hmmm.

Here in Maine, a frost heave is a buckling of the ground (roadsigns will indicate "frost heave ahead") because water underneath the pavement has frozen and expanded, thus causing bumps and ripples in the street which can do a number on your vehicle.

[GirlinContempt]

4. The freezing and melting

causes frost heaves more so than just freezing. In summer, it would be because it is new from the previous winter and probably hasn't been dealt with yet, if it can be.

[crim son]

6. No, that's right. We get them in the spring.

It doesn't get cold enough in Maine for a freeze during the summer. Thank god for small favors.

[GirlinContempt]

8. I didn't say it freezes in the summer

just that in the summer, it's still a problem as the heaves are still there.

[crim son]

9. Oh, I get what you're saying!

Now I'm wondering where you're from, and I'll check - it's not a phenomenon here, for some reason.
On edit: You probably have some major frostheaves! I can imagine the damage would remain after the freezing weather is gone.

[GirlinContempt]

10. Yup for sure

:)

[mainegreen]

5. Frost heaves are devices that turn automobiles into temporary airplanes. n/t

[Gormy Cuss]

7. I thought a frost heave was what happened when a snowman partied too much.

I liked your definition, however.:D

[sarge43]

11. At Warp Nine, you can't feel the frost heaves. n/t

[Rabrrrrrr]

12. Vomiting ice cream

[u4ic]

13. Puking outside the bar

in -35 weather. :P

[JustABozoOnThisBus]

14. Don't eat the yellow snow ...

or it's "frost heaves"

:puke: